Marinate chicken cutlets, thighs, or breasts in 2 cups buttermilk
Mix dry batter ingredients: potato starch, rice flour, chili powder, garlic powder, sazon, onion powder, and MSG
Coat marinated chicken in the dry batter mixture
Fry the coated chicken until golden and crispy
Make the sauce by melting butter and sautéing garlic, ginger, and chili flakes
Add rice vinegar, soy sauce, orange zest and juice to the sauce
Mix corn starch with water and add to sauce to thicken
Stir in honey to the sauce
Toss fried chicken in the orange sauce
Toast potato buns
Assemble sandwiches with sauce-coated chicken, kimchi, and kewpie mayo on buns
